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Ok, I'm wiring up some fans in my helmet. I read a post a while back bout someone wiring up a few helmet fans and the thing blew up because of it bing wired correctly. Battery acid went everywhere. Luckly the guy and his helmet was okay but the inside was ruind. I really don't wana be wearing my helmet and *KA-BOOM* . Lets just say my head might not be there. I'd really be like Jango Fett. Anyway, here is a quick sketch of what I got.

just remember AA batteries are 1.5v a piece. 4 x 1.5= 6.v you have a 12v fan unless that fan is a very hi output fan its not going to move much air at half the rated voltage. Now 9v will run at 75% rated speed and its over twice as small. but what do I know, I dont have any fans in mine and its killing me!!

Okay...ran to Radioshack and picked up some toy I got myself one of the bad boys...The 12V 5AH Battery. My fan runs so fast. I like it. Now, the thing is...Can I run 3 fans with one switch on one 12 V battery and still get the power needed? and if this is possible...how do I go about doing this...Daisy chain them...? Anyone wana hop in paint and sketch up a few designs? also, is their any quick disconnects that I can wire up to the battery and the wires before the switch? That way it would be easier to take stuff on and off?

make sure your first wires (from the battery all the way to close proximity to the fans) should be a little thicker gauge then the ones going to the fans) I'm not saying put 2 gauge wire or anything like that, just a little thicker than the ones the fans are connected with. plus it will make your disconnect easier to work with if it is a thicker wire.

make sure your first wires (from the battery all the way to close proximity to the fans) should be a little thicker gauge then the ones going to the fans) I'm not saying put 2 gauge wire or anything like that, just a little thicker than the ones the fans are connected with. plus it will make your disconnect easier to work with if it is a thicker wire.

I got ome 24 gauge wire and will wire them up. Any ideas where I can get a quick disconnect? and I'm also going to souder them and shrink wrap them too.

Well there is a problem with my switch. Everytime I hook everything up, it starts to spark...Not sure what the deal is. Anyone know whats the problem. And that was only hooking it up to one fan to see if it would work. Good thing I didn't hook up all 3.

I have both my helmets running off 2 9v batteries in parallel with a switch and forward indicator light to let me know when the cells are low. Parallel is IMHO the best way to wire the things up since it takes the combined 18V and halves it instead of running 9 separate volts to each fan. They last a bit longer that way on premium batts. I can turn them on at 8am and there running at 8pm.

I have both my helmets running off 2 9v batteries in parallel with a switch and forward indicator light to let me know when the cells are low. Parallel is IMHO the best way to wire the things up since it takes the combined 18V and halves it instead of running 9 separate volts to each fan. They last a bit longer that way on premium batts. I can turn them on at 8am and there running at 8pm.

Novall, I'd love to see your fan set up as I'm at the stage where I'd like to fianlly install my two 12V fans. I'm pretty good with simple circuits, but I'd like to be certain how to wire everything before i start and mess up some thing.